# Flow Rate Help vs Darcy Weisbach Equations Calc

The clearest difference is price: Flow Rate Help at $0.99 against Darcy Weisbach Equations Calc's $2.99. Flow Rate Help also leads on iOS requirement (11.0 vs 13). On review sentiment, update cadence, ads and in-app purchases there is nothing between them.

Flow Rate Help costs $0.99 and Darcy Weisbach Equations Calc $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Flow Rate Help ships an update every 15 months, Darcy Weisbach Equations Calc every 26 months. The most recent releases landed on November 2, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Flow Rate Help | Darcy Weisbach Equations Calc |
| --- | --- | --- |
| Price | **$0.99** | $2.99 |
| Rating | **[4.3 (44 ratings)](https://appshunter.io/ios/app/flow-rate-help/id1009898806/reviews)** | — |
| Number of ratings | **44** | — |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 15 months** | Every 26 months |
| Monetization | Paid | Paid |
| Size | 3 MB | 1 MB |
| Requires iOS | **11.0** | 13 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Armchair Engineering](https://appshunter.io/developer/398901339) | [Nitrio](https://appshunter.io/developer/321121189) |

## What reviewers say

### Flow Rate Help

[App page](https://appshunter.io/ios/app/flow-rate-help/id1009898806)

Calculate liquid flow rate, pipe diameter, or velocity with ease. Customize units for diameter, velocity, and flow rate, and set your preferred decimal places for precise results.

**Highlights:** Solve flow rate equations, Customizable diameter units, Customizable velocity units, Customizable flow rate units, Set decimal places

**Features:** Vision Pro support

**In-app purchases:** none


### Darcy Weisbach Equations Calc

[App page](https://appshunter.io/ios/app/darcy-weisbach-equations-calc/id1448457638)

This physics and math calculator quickly computes fluid head loss, friction factor, and other pipe flow parameters. It supports various units and offers precise calculations up to 16 decimal places. Results can be easily copied to other applications.

**Highlights:** Instant calculation, Copyable results, Formula reference, 16 decimal place precision, Multiple unit support, Ad-free and private

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Flow Rate Help free?

Flow Rate Help costs $0.99, with no in-app purchases.

### Is Darcy Weisbach Equations Calc free?

Darcy Weisbach Equations Calc costs $2.99, with no in-app purchases.

### Do Flow Rate Help or Darcy Weisbach Equations Calc have ads?

Neither Flow Rate Help nor Darcy Weisbach Equations Calc shows ads.

### Which is updated more often, Flow Rate Help or Darcy Weisbach Equations Calc?

Flow Rate Help ships an update every 15 months, and Darcy Weisbach Equations Calc every 26 months. Most recently, Flow Rate Help was updated on November 2, 2026 and Darcy Weisbach Equations Calc on October 25, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*